搜索结果: 1-15 共查到“理学 TM”相关记录33条 . 查询时间(0.059 秒)
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中国科学院合肥物质科学岛团队在~2微米Tm:YAP激光性能提升方面取得进展(图)
激光 性能 晶体
2024/11/11
2024年8月28日,中国科学院合肥物质院安光所孙敦陆研究员课题组在2µm(微米)Tm:YAP激光性能提升方面取得新进展,团队采用单端泵浦四种不同类型的Tm:YAP晶体棒,并在键合凹端面Tm:YAP晶体棒中实现了最优的激光性能输出,相关成果以《采用热键合与凹端面提升LD端面泵浦Tm:YAP的激光性能》为题发表在在光学领域国际知名期刊Optics Express上。
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上海光机所首次提出TM偏振全介质光栅激光损伤阈值优越性(图)
激光装置 演化过程
2023/11/29
2023年11月7日,中国科学院上海光学精密机械研究所邵建达研究员、晋云霞研究员团队在TM偏振全介质脉冲压缩光栅领域取得突破性进展。相关成果以“TM polarization preferentially implemented in the next generation of high-intensity laser systems based on multilayer dielectric...
ANALYSIS OF THE SHORELINE POSITION EXTRACTED FROM LANDSAT TM AND ETM+ IMAGERY
Shoreline position Landsat imagery
2015/5/7
A statistical analysis of the results obtained by the tool SELI (Shoreline Extraction from Landsat Imagery) is made in order to characterise the medium and long term period changes occurring on beac...
Mass-conserving tracer transport modelling on a reduced latitude-longitude grid with NIES-TM
Mass-conserving tracer transport modelling a reduced latitude-longitude grid NIES-TM
2014/12/9
The need to perform long-term simulations with reasonable accuracy has led to the development of mass-conservative and efficient numerical methods for solving the transport equation in forward and inv...
Environmental monitoring of estuaries: Estimating and mapping various environmental indicators in Matla estuarine complex, using Landsat TM digital data
Estuaries chlorophyll suspended solids salinity temperature turbidity
2014/11/25
The spatial and temporal distribution of suspended solids, turbidity, temperature, salinity,
chlorophyll a and total phosphorus were estimated and mapped with various degrees of
success in Matla E...
透明β-NaYF4:Yb,Tm/PMMA 纳米复合材料的制备及其光学性能
上转换发光 掺杂浓度 核壳结构 NaYF4
2014/3/15
采用高温溶剂热法制备了一系列不同Yb3+掺杂浓度的上转换发光纳米粒子β-NaYF4:Yb,Tm和核壳结构的β-NaYF4:Yb,Tm@β-NaYF4:Yb纳米粒子。采用X射线衍射(XRD)、场发射扫描电镜(FESEM)、光致发光(PL)谱对材料的物相结构、形貌特征和发光性质进行了表征和研究,并特别研究了温度对材料发光性能的影响。结果表明:保持Tm3+浓度不变,随着Yb3+掺杂浓度的增加,β-NaY...
利用简单的高温固相法合成稀土离子掺杂的NaLn4-x(SiO4)3F:xRE3+(Ln=La, Gd; RE=Tb, Dy, Sm, Tm)系列荧光粉,利用X射线粉末衍射仪和荧光分光光度计分别测试其物相结构和荧光性能。结果表明,所合成样品均为纯的六方晶系结构,在紫外光激发下所合成样品均表现出所掺杂稀土离子的f-f特征能级跃迁,Tb3+、Dy3+、Sm3+和Tm3+等激活离子分别发出蓝绿色、白色、橙...
Ag纳米晶对Tm/Yb共掺碲酸盐玻璃上转换发光性能的影响
Tm/Yb 碲酸盐玻璃 Ag纳米晶 上转换发光机理
2013/10/15
在稀土离子掺杂碲酸盐玻璃中引入Ag纳米晶,通过等离子共振(SPR)可使荧光发射得到增强,上转换发光效率得到明显提升。研究了Ag纳米晶对Tm3+/Yb3+共掺碲酸盐玻璃上转换发光的影响,分析了上转换发光机理。结果发现,经过(330℃,30 min)热处理后,玻璃中析出了Ag纳米颗粒,尺寸为5~8 nm。Ag纳米晶的引入可使玻璃上转换蓝、红光由三光子吸收转变为双光子吸收。由于局域场表面等离子体共振增强...
城市复杂地表TM温度反演及其与MODIS产品的比较
城市 复杂地表 温度反演 遥感
2013/9/26
在利用决策树模型将城市复杂地表分为植被、建筑物、水体、裸土等4类进行地表比辐射率估算和利用MODIS近红外数据反演大气水分含量的基础上,采用Jim nez-Mu oz单通道算法进行了城市复杂地表TM温度的反演,并将反演结果与EOSMODIS地表温度产品进行了比较分析。结果表明:(1)基于地表信息分类提取后的地表比辐射率和MODIS反演的大气水汽含量得到的地表温度接近于实际状况;(2)反演结果与EO...
边冠图 Tm◇Sn的临界群
Laplacian 矩阵 临界群 群的Smith 标准型 边冠图
2012/11/23
确定了任意树与星的边冠图 Tm◇Sn 的临界群的代数结构,证明了边冠图 Tm◇Sn 的临界群的Smith标准型为 (n-2)m 个循环群的直和,同时给出了图 Tm◇Sn的生成树数目.
Demonstration of high-Q TE-TM photonic crystal nanobeam cavities
high-Q TE-TM photonic crystal nanobeam cavities Physics
2010/11/16
We experimentally demonstrate high Quality factor dual-polarized TE-TM photonic crystal nanobeam cavities. The free-standing nanobeams are fabricated in a 500 nm thick silicon layer, and are probed u...
Assessment of Wetlands in Kuala Terengganu District Using Landsat^TM
Wetland Remote sensing Rate of change Setiu
2009/12/3
Wetland cover mapping is very important in identifying its areal extent and the rate of change over time. This studyaims to map the areal extent and its rate of change in Kuala Terengganu district whi...
Landsat Thematic Mapper (TM) Derived Reflectance from a Mountainous Watershed during the Snow Melt Season
Landsat Thematic Mapper Mountainous Watershed Snow Melt Season
2009/10/26
Landsat-5 Thematic Mapper (TM) reflectances recorded i May 1989 from a
mountainous catchment at Kvikne, Norway, are analyzed and compared with
simultaneously measured in situ albedo. The satellite-r...